# Pristine Kavalostka

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gioxis@gmail.com

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# 118 Accepts

 2d accepted Is there a name for this kind of function? 2d accepted How to obtain all the rational numbers without repetitions? 2d accepted Is it true that there is no algorithm to approximate the least upper bound? Feb9 accepted Why can't I obtain values of Sine/Cosine with $f(x)=\sqrt{1-x^2}?$ Jan26 accepted What's the right moment to learn Set Theory? Jan26 accepted Is there a proof of the irrationality of $\sqrt{2}$ that involves modular arithmetic? Jan26 accepted Since the conception of Set Theory, was Russell's Set the only problematic set found? Jan26 accepted Misconceptions about Cantor's diagonal argument? Jan26 accepted What's the successor of $\emptyset$? Do we need to assume that $\emptyset \in \emptyset$ for the successor to exist? Jan26 accepted Doubts on the axiom of union? Jan24 accepted $(X \supset A)\wedge (X \supset B)|(Y\supset A) \wedge (Y \supset B)\to Y\supset X$|Prove that $X=A \cup B$. Jan4 accepted What's the name/purpose of this process, precisely? Jan4 accepted What's the proof that the sum and multiplication of natural numbers is a natural number? Dec20 accepted The Cauchy-Schwarz Master Class, Problem $1.2$ Nov6 accepted When proving that there is not rational number $m/n$ equal to $\sqrt{2}$, why does $m$ and $n$ must be not both even? Oct31 accepted Barbeau's Polynomials, Exploration 2 Oct28 accepted How to solve this class of problems? Aug14 accepted Why they use the word “abstract” for naming mathematical fields of study? Aug7 accepted Is there a specific reason to choose $3$ and $1$ for evaluating these limits? Aug7 accepted How to find the area of an isoceles triangle when only the length of the two equal sides is given?